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47A10 Spectrum, resolvent (71 articles)

• Gil', Michael: Perturbations of real parts of eigenvalues of bounded linear operators in a Hilbert space. (English). Czechoslovak Mathematical Journal, vol. 74 (2024), issue 2, pp. 567-573
• Mouton, Sonja: Generalized spectral perturbation and the boundary spectrum. (English). Czechoslovak Mathematical Journal, vol. 71 (2021), issue 2, pp. 603-621
• Hadder, Youness: The kh-socle of a commutative semisimple Banach algebra. (English). Mathematica Bohemica, vol. 145 (2020), issue 4, pp. 387-399
• Carpintero, Carlos; Gutiérrez, Alexander; Rosas, Ennis; Sanabria, José: A note on preservation of spectra for two given operators. (English). Mathematica Bohemica, vol. 145 (2020), issue 2, pp. 113-126
• Tajmouati, Abdelaziz; El Bakkali, Abdeslam; Karmouni, Mohammed: On some local spectral theory and bounded local resolvent of operator matrices. (English). Mathematica Bohemica, vol. 143 (2018), issue 2, pp. 113-122
• Jabbarzadeh, Mohammad Reza; Hajipouri, Rana: Weighted Frobenius-Perron operators and their spectra. (English). Mathematica Bohemica, vol. 142 (2017), issue 2, pp. 113-124
• Berkani, Mohammed; Sarih, Mustapha; Zariouh, Hassan: A-Browder-type theorems for direct sums of operators. (English). Mathematica Bohemica, vol. 141 (2016), issue 1, pp. 99-108
• Berkani, Mohammed: Abstract Weyl-type theorems. (English). Mathematica Bohemica, vol. 141 (2016), issue 4, pp. 495-508
• Grobler, Jacobus J.; Raubenheimer, Heinrich; Swartz, Andre: The index for Fredholm elements in a Banach algebra via a trace II. (English). Czechoslovak Mathematical Journal, vol. 66 (2016), issue 1, pp. 205-211
• Braatvedt, Gareth; Brits, Rudi: Geometry of the spectral semidistance in Banach algebras. (English). Czechoslovak Mathematical Journal, vol. 64 (2014), issue 3, pp. 599-610
• Zima, Mirosława: Spectral radius inequalities for positive commutators. (English). Czechoslovak Mathematical Journal, vol. 64 (2014), issue 1, pp. 1-10
• Amouch, M.; Zguitti, H.: B-Fredholm and Drazin invertible operators through localized SVEP. (English). Mathematica Bohemica, vol. 136 (2011), issue 1, pp. 39-49
• Bendaoud, M.; Sarih, M.: Locally spectrally bounded linear maps. (English). Mathematica Bohemica, vol. 136 (2011), issue 1, pp. 81-89
• Berkani, M.; Zariouh, H.: Extended Weyl type theorems. (English). Mathematica Bohemica, vol. 134 (2009), issue 4, pp. 369-378
• Amouch, M.; Zguitti, H.: A note on the $a$-Browder’s and $a$-Weyl’s theorems. (English). Mathematica Bohemica, vol. 133 (2008), issue 2, pp. 157-166
• Zajac, Michal: On reflexivity and hyperreflexivity of some spaces of intertwining operators. (English). Mathematica Bohemica, vol. 133 (2008), issue 1, pp. 75-83
• Ko, Eungil; Nam, Hae-Won; Yang, Youngoh: On totally $\ast$-paranormal operators. (English). Czechoslovak Mathematical Journal, vol. 56 (2006), issue 4, pp. 1265-1280
• Berkani, M.; Castro, N.; Djordjević, S. V.: Single valued extension property and generalized Weyl’s theorem. (English). Mathematica Bohemica, vol. 131 (2006), issue 1, pp. 29-38
• Arora, S. C.; Batra, Ruchika; Singh, M. P.: Slant Hankel operators. (English). Archivum Mathematicum, vol. 42 (2006), issue 2, pp. 125-133
• Ibrahim, Sobhy El-sayed: The spectra of general differential operators in the direct sum spaces. (English). Czechoslovak Mathematical Journal, vol. 54 (2004), issue 1, pp. 9-29
• Koliha, J. J.; Tran, Trung Dinh: Closed semistable operators and singular differential equations. (English). Czechoslovak Mathematical Journal, vol. 53 (2003), issue 3, pp. 605-620
• Appell, Jürgen: A la recherche du spectre perdu: An invitation to nonlinear spectral theory. (English). In: Opic, Bohumír and Rákosník, Jiří (eds.): Nonlinear Analysis, Function Spaces and Applications, Proceedings of the Spring School held in Prague, July 17-22, 2002. Vol. 7. Czech Academy of Sciences, Mathematical Institute, Praha, 2003. pp. 1-20
• Tran, Trung Dinh: Spectral sets and the Drazin inverse with applications to second order differential equations. (English). Applications of Mathematics, vol. 47 (2002), issue 1, pp. 1-8
• Djordjević, Dragan S.; Stanimirović, Predrag S.: On the generalized Drazin inverse and generalized resolvent. (English). Czechoslovak Mathematical Journal, vol. 51 (2001), issue 3, pp. 617-634
• Drnovšek, Roman: Bounds for the spectral radius of positive operators. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 41 (2000), issue 3, pp. 459-467
• Appell, Jürgen: Ein „merkwürdiges” Spektrum für nichtlineare Operatoren. (German) [A "strange" spectrum for nonlinear operators]. Mathematica Bohemica, vol. 124 (1999), issue 2, pp. 221-229
• Mecheri, Salah: Commutants and derivation ranges. (English). Czechoslovak Mathematical Journal, vol. 49 (1999), issue 4, pp. 843-847
• Peňa, Simón: Discrete spectra criteria for singular difference operators. (English). Mathematica Bohemica, vol. 124 (1999), issue 1, pp. 35-44
• Müller, Vladimír: On the topological boundary of the one-sided spectrum. (English). Czechoslovak Mathematical Journal, vol. 49 (1999), issue 3, pp. 561-568
• Kyncl, Jan: Dominant eigenvalue problem for positive integral operators and its solution by Monte Carlo method. (English). Applications of Mathematics, vol. 43 (1998), issue 3, pp. 161-171
• Torgašev, Aleksandar: On operators with the same local spectra. (English). Czechoslovak Mathematical Journal, vol. 48 (1998), issue 1, pp. 77-83
• Kordula, Vladimír: On the defect spectrum of an extension of a Banach space operator. (English). Czechoslovak Mathematical Journal, vol. 48 (1998), issue 4, pp. 609-616
• Dont, Miroslav: Fourier problem with bounded Baire data. (English). Mathematica Bohemica, vol. 122 (1997), issue 4, pp. 405-441
• van Neerven, J. M. A. M.: On the orbits of an operator with spectral radius one. (English). Czechoslovak Mathematical Journal, vol. 45 (1995), issue 3, pp. 495-502
• Stavinoha, Pavel: On limits of $L_p$-norms of an integral operator. (English). Applications of Mathematics, vol. 39 (1994), issue 4, pp. 299-307
• Laursen, K. B.; Neumann, M. M.: Asymptotic intertwining and spectral inclusions on Banach spaces. (English). Czechoslovak Mathematical Journal, vol. 43 (1993), issue 3, pp. 483-497
• Ricker, W. J.: Examples of stable $C_0$-semigroups. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 33 (1992), issue 2, pp. 121-128
• Medková, Dagmar: On the convergence of Neumann series for noncompact operators. (English). Czechoslovak Mathematical Journal, vol. 41 (1991), issue 2, pp. 312-316
• Sołtysiak, Andrzej: A note on the almost left and almost right joint spectra of R. Harte. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 30 (1989), issue 2, pp. 317-320
• Burlando, Laura: On the problem of invariance under holomorphic functions for a set of continuity points of the spectrum function. (English). Czechoslovak Mathematical Journal, vol. 39 (1989), issue 1, pp. 95-110
• Laursen, Kjeld Bagger; Vrbová, Pavla: Some remarks on the surjectivity spectrum of linear operators. (English). Czechoslovak Mathematical Journal, vol. 39 (1989), issue 4, pp. 730-739
• Pták, Vlastimil; Vrbová, Pavla: Algebraic spectral subspaces. (English). Czechoslovak Mathematical Journal, vol. 38 (1988), issue 2, pp. 342-350
• Müller, Vladimír: Local spectral radius formula for operators in Banach spaces. (English). Czechoslovak Mathematical Journal, vol. 38 (1988), issue 4, pp. 726-729
• Kojecký, Tomáš: On a certain class of always convergent sequences and the Rayleigh quotient iterations. (English). Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, vol. 27 (1988), issue 1, pp. 85-90
• Müller, Vladimír; Sołtysiak, Andrzej: On the largest generalized joint spectrum. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 29 (1988), issue 2, pp. 255-259
• Daneš, Josef: On local spectral radius. (English). Časopis pro pěstování matematiky, vol. 112 (1987), issue 2, pp. 177-187
• Beucher, O. J.: On certain quantities in Fredholm operator theory and Mil'man's isometry spectrum. (English). In: Frolík, Z., Souček, V. and Vinárek, J. (eds.): Proceedings of the 13th Winter School on Abstract Analysis. Section of Analysis. Circolo Matematico di Palermo, Palermo, 1985. pp. [17]-24
• Linde, Rainer: s-numbers of diagonal operators and Besov embeddings. (English). In: Frolík, Z., Souček, V. and Vinárek, J. (eds.): Proceedings of the 13th Winter School on Abstract Analysis. Section of Analysis. Circolo Matematico di Palermo, Palermo, 1985. pp. [83]-110
• Regińska, Teresa: Convergence of approximation methods for eigenvalue problem for two forms. (English). Aplikace matematiky, vol. 29 (1984), issue 5, pp. 333-341
• Patel, A. B.; Vidyanagar, Vallabh: Joint essential spectra. (English). Czechoslovak Mathematical Journal, vol. 34 (1984), issue 4, pp. 598-603
• Pokrzywa, Andrzej: Spectral approximation of positive operators by iteration subspace method. (English). Aplikace matematiky, vol. 29 (1984), issue 2, pp. 104-113
• Kopáčková, Marie: On periodic solution of a nonlinear beam equation. (English). Aplikace matematiky, vol. 28 (1983), issue 2, pp. 108-115
• Wrobel, Volker: Tensor products of linear operators in locally convex spaces. (English). In: Frolík, Zdeněk (ed.): Proceedings of the 10th Winter School on Abstract Analysis. Circolo Matematico di Palermo, Palermo, 1982. pp. [299]-315
• Kolomý, Josef: On determination of eigenvalues and eigenvectors of selfadjoint operators. (English). Aplikace matematiky, vol. 26 (1981), issue 3, pp. 161-170
• Vasilescu, Florian-Horia: Spectral mapping theorem for the local spectrum. (English). Czechoslovak Mathematical Journal, vol. 30 (1980), issue 1, pp. 28-35
• Luong Dinh Tin: The comparison of spectrum of normalizable matrices. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 19 (1978), issue 2, pp. 69-74
• Zajac, Michal: Continuity of the spectrum of norm-normal matrices. (English). Mathematica Slovaca, vol. 28 (1978), issue 3, pp. 317-319
• Marek, I.: Perron root of a convex combination of a positive kernel and its adjoint. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 19 (1978), issue 1, pp. 3-14
• Frunză, Ştefan: A characterization for the spectral capacity of a finite system of operators. (English). Czechoslovak Mathematical Journal, vol. 27 (1977), issue 3, pp. 356-362
• Nassif, N.; Descloux, J.; Rappaz, J.: On properties of spectral approximations. (English). In: Fábera, Jiří (ed.): Equadiff IV. Czechoslovak Conference on Differential Equations and Their Applications. Proceedings, Prague, August 22-26, 1977. Springer-Verlag, Berlin, 1979. pp. [81]-85
• Pták, Vlastimil; Zemánek, Jaroslav: Continuite lipschitzienne du spectre comme fonction d'un opérateur normal. (French) [Lipschitz continuity of spectrum as function of a normal operator]. Commentationes Mathematicae Universitatis Carolinae, vol. 17 (1976), issue 3, pp. 507-512
• Marek, I.: Fredholm points of compactly perturbed bounded linear operators. (English). In: Novák, Josef (ed.): General topology and its relations to modern analysis and algebra IV, Proceedings of the fourth Prague topological symposium, 1976. Part B: Contributed Papers. Society of Czechoslovak Mathematicians and Physicist, Praha, 1977. pp. [268]-275
• Pták, Vlastimil: The spectral radii of an operator and its modulus. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 17 (1976), issue 2, pp. 273-279
• Groetsch, Charles W.: A product integral representation of the generalized inverse. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 16 (1975), issue 1, pp. 13-20
• Koliha, Jaromír J.: The product of relatively regular operators. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 16 (1975), issue 3, pp. 531-539
• Kuhnert, F.: Beziehungen zwischen den Verfahren von Ritz und Bazley. (German). Acta Universitatis Carolinae. Mathematica et Physica, vol. 15 (1974), issue 1, pp. 79-[80]
• Hadeler, K. P.: On a class of nonlinear eigenvalue problems. (English). Acta Universitatis Carolinae. Mathematica et Physica, vol. 15 (1974), issue 1, pp. 35-38
• Vrbová, Pavla: On local spectral properties of operators in Banach spaces. (English). Czechoslovak Mathematical Journal, vol. 23 (1973), issue 3, pp. 483-492
• Vejvoda, Otto; Straškraba, Ivan: Periodic solutions to abstract differential equations. (English). In: Ráb, Miloš and Vosmanský, Jaromír (eds.): Proceedings of Equadiff III. 3rd Czechoslovak Conference on Differential Equations and Their Applications. Brno, Czechoslovakia, August 28 - September 1, 1972. Univ. J. E. Purkyně - Přírodovědecká fakulta, Brno, 1973. pp. 199-203
• Gvozdková, Pavla: On continuity of linear transformations commuting with generalized scalar operators (Preliminary communication). (English). Commentationes Mathematicae Universitatis Carolinae, vol. 11 (1970), issue 3, pp. 583-588
• Najzar, Karel: On the method of least squares of finding eigenvalues and eigenfunctions of some symmetric operators. II. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 11 (1970), issue 3, pp. 449-462